The goal was to keep the engine displacement as small as possible in order to deliver unrivalled power-to-weight for a vehicle weighing under 1,000 kg.
The streamlined 3.9-litre V12 delivered was free of both coverings and belt-driven accessories and became the highest-revving engine ever made for a production car.
[citation needed] The T.50’s version of the GMA V12 engine generates high-end power of 663 PS (654 hp) at 11,500 rpm.
Its block is constructed from a high-strength aluminium alloy, the steel crankshaft weighs only 13 kg (29 lb), the pistons are made from a Metal matrix composite (MMC), and the connecting rods and valves are made of titanium (as is the clutch housing).
[4] The racing version of the GMA engine also has had various tweaks, including removing the catalytic converters from the exhaust system, narrower inconel walls, and smaller mufflers, now weighing 162 kg (357 lb).